yz400 Valve Adjustment


24 replies to this topic
  • rickybobby2189

Posted May 12, 2011 - 10:00 AM

#21

Ok everytime I think I have got what info I need something else pops up....Will I need a new set of valve guides or are they re-usable?? THANKS grayracer

  • grayracer513

Posted May 12, 2011 - 10:22 AM

#22

The valve guides almost never need replacing on a YZF. If you do replace them, it is imperative that you have a machinist refinish the seats and install new valves.

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • rickybobby2189

Posted May 18, 2011 - 04:09 PM

#23

Well got what I needed to do the job..I thought. The compressor I got had a collar that was way to large to fit in my head. I am assuming I will have to buy one because I cant figure any other way out...Anyone know of anything else I can use to get by?

  • slyfox83c

Posted May 18, 2011 - 05:55 PM

#24

I just adjusted the valves on my 99 yz400 today and yes you are going to need different thickness shims for all your valves. The buckes are no big deal just use a teliscoping magnet to pull them out. Most of the shims will come out with the buckets. You just need a real good set of feeler guages.
As far as the spring compressor yes you will need one. You can use a carberator screwdriver with the built in magnet. you will need it to remove and install the retaining clips for your valves.
I am still fighting my bike's running issues. hard to start and wont idol. I just ordered a jet kit from JD and i hope it fixes it. Every thing else is checking out.
Good luck with your race.

  • rickybobby2189

Posted May 18, 2011 - 05:58 PM

#25

i just now figured a way without the spring compressor i used a monkey wrench and a roach clip as the stoners call them lol...i got them out like that and put one set back in just for a test before i put the seals in...iam glad i figured that out





Related Content

Forums
Photo

Michigan Motocross Tires by 288yz450


Dirt Bike   Dirt Bike Regional Discussion   North
  • 1 reply
Forums
Photo

Is it worth it? (Cam and High compression piston) by macgi77


Dirt Bike   Make / Model Specific   Honda   CRF 150/230 F/L
  • Hot  36 replies
Forums
Photo

YZ450F 03 Sparks driving me crazy by SirAttard


Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • 5 replies
Forums
Photo

Snake pit oct 30th by The Anvil


Dirt Bike   Dirt Bike Regional Discussion   California
  • Hot  293 replies
Reviews

Yamaha YZ450F 2017 by Chris.GVS


Yamaha YZ450F 2017
  • - - - - -
  • 0 reviews
 
x

Join Our Community!

Even if you don't want to post, registered members get access to tools that make finding & following the good stuff easier.

If you enjoyed reading about "" here in the ThumperTalk archive, you'll LOVE our community. Come join ThumperTalk today!

The views and opinions expressed on this page are strictly those of the author, and have not been reviewed or approved by ThumperTalk.